I agree it could become the best selling console but I don't agree with how you arrive at 155+. Switch will sell to people who didn't buy a 3DS or PS4.
Switch @ $100-$150 will do it if Nintendo can keep up on the software and don't shoot themselves in the head. Some non-gaming functionality might be required.
100M+ is a lock imo and I see Switch beating PS4.
Nov 2016 - NES outsells PS1 (JP)
Don't Play Stationary 4 ever. Switch!